Added GlobalCEFApp.DisablePDFExtension property

- Bug fix #89
- New SimpleLazOSRBrowser demo

demos/ToolBoxBrowser/uMainForm.pas

@@ -88,7 +88,7 @@ type
 var
   MainForm: TMainForm;
 
-procedure GlobalCEFApp_OnContextInitialized;
+procedure CreateGlobalCEFApp;
 
 implementation
 
@@ -108,6 +108,12 @@ begin
     PostMessage(MainForm.Handle, CEFBROWSER_INITIALIZED, 0, 0);
 end;
 
+procedure CreateGlobalCEFApp;
+begin
+  GlobalCEFApp                      := TCefApplication.Create;
+  GlobalCEFApp.OnContextInitialized := GlobalCEFApp_OnContextInitialized;
+end;
+
 procedure TMainForm.CreateToolboxChild(const ChildCaption, URL: string);
 var
   TempChild : TChildForm;